SF Generalization of Refresh Rates: Adding layer priority hint

Test: Device boots. Observe logs for errors.
Test: Open Swappy and Chrome in split screen, tap between apps,
      SF prints the correct priority.
Test: Open Chrome, play video. SF prints correct priority.
Test: SF prints the correct priority received.
Bug: 142507166
Change-Id: I5fa8a857c950db01f42a380a72d098039badc289
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 65d02ad..46cfb21 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -1747,12 +1747,6 @@
                 mGpuFrameMissedCount++;
             }
 
-            mScheduler->chooseRefreshRateForContent();
-
-            if (performSetActiveConfig()) {
-                break;
-            }
-
             if (frameMissed && mPropagateBackpressure) {
                 if ((hwcFrameMissed && !gpuFrameMissed) ||
                     mPropagateBackpressureClientComposition) {
@@ -1769,6 +1763,13 @@
             bool refreshNeeded = handleMessageTransaction();
             refreshNeeded |= handleMessageInvalidate();
 
+            // Layers need to get updated (in the previous line) before we can use them for
+            // choosing the refresh rate.
+            mScheduler->chooseRefreshRateForContent();
+            if (performSetActiveConfig()) {
+                break;
+            }
+
             updateCursorAsync();
             updateInputFlinger();
 
@@ -3474,6 +3475,11 @@
     if (what & layer_state_t::eShadowRadiusChanged) {
         if (layer->setShadowRadius(s.shadowRadius)) flags |= eTraversalNeeded;
     }
+    if (what & layer_state_t::eFrameRateSelectionPriority) {
+        if (privileged && layer->setFrameRateSelectionPriority(s.frameRateSelectionPriority)) {
+            flags |= eTraversalNeeded;
+        }
+    }
     // This has to happen after we reparent children because when we reparent to null we remove
     // child layers from current state and remove its relative z. If the children are reparented in
     // the same transaction, then we have to make sure we reparent the children first so we do not